|Full name||Ryuta Koike|
|Date of birth||August 29, 1995|
|Place of birth||Hachiōji, Tokyo, Japan|
|Height||1.69 m (5 ft 6 1⁄2 in)|
|2008–2013||JFA Academy Fukushima|
* Senior club appearances and goals counted for the domestic league only and correct as of 23 February 2016.
During his five years-stint with JFA Academy, he was moved from midfield to defence. He was signed by Renofa Yamaguchi in January 2014.
- Nippon Sports Kikaku Publishing inc./日本スポーツ企画出版社, "2016J1&J2&J3選手名鑑", 10 February 2016, Japan, ISBN 978-4905411338 (p. 239 out of 289)